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RE: [Xen-ia64-devel] [PATCH] access_reflection fix


  • To: "Xu, Anthony" <anthony.xu@xxxxxxxxx>, "xen-ia64-devel" <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>
  • Date: Wed, 29 Mar 2006 14:00:56 -0800
  • Delivery-date: Wed, 29 Mar 2006 22:02:21 +0000
  • List-id: Discussion of the ia64 port of Xen <xen-ia64-devel.lists.xensource.com>
  • Thread-index: AcZTT7lX/rwT2iDaRI2kEAyIgbwjUQAEOsXAAAbfG7A=
  • Thread-topic: [Xen-ia64-devel] [PATCH] access_reflection fix

Ah but with further examination, I see that setting
the bits to zero will avoid problems, so I agree
now that the patch is good. 

> -----Original Message-----
> From: Magenheimer, Dan (HP Labs Fort Collins) 
> Sent: Wednesday, March 29, 2006 11:45 AM
> To: 'Xu, Anthony'; xen-ia64-devel
> Subject: RE: [Xen-ia64-devel] [PATCH] access_reflection fix
> 
> I am reading from an old SDM so this may have changed,
> but I think the low two bits of cr.itir are NOT reserved,
> so it is not necessary to write zero to them.
> 
> See SDM Vol2 3.3.5.5 
> 
> > -----Original Message-----
> > From: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> > [mailto:xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf 
> > Of Xu, Anthony
> > Sent: Wednesday, March 29, 2006 9:42 AM
> > To: xen-ia64-devel
> > Subject: [Xen-ia64-devel] [PATCH] access_reflection fix
> > 
> > Before injecting fault to guest, VMM need to setup
> > guest itir by using guest region register.
> > But the lowest two bits of itir are reserved. VMM need
> > to reset these two bits.
> > 
> > Signed-off-by: Anthony Xu <anthony.xu@xxxxxxxxx>
> > 
> > Thanks,
> > -Anthony 
> > 
> > 
> 

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